help with idle speed question
+ Reply to Thread
Results 1 to 4 of 4

Thread:
help with idle speed question

  1. #1
    Member Rude Ron's Avatar
    Join Date
    Mar 2011
    Location
    Modesto
    Posts
    48

    Default help with idle speed question

    hello anyone know what at idle in gear rpm I should be running for twin 454 magnum engines with moderate 540 lift hydraulic flat tappet cams? I've keep it around a thousand rpm's cuz the motors are brand new so to make sure the cams are getting plenty of oil while idling out of the fairly long 5 mph no wake zone at the launch ramp, but thats too high and hard to dock, I'm confident the cams were broken in correctly on initial start up, but hear lots of horror stories about cam lobes going flat now days. I run a zinc replacement in my oil and have killer oil pressure with High Volume oil pumps, so what do you think a good in gear idle rpm is? thanks for any help ron

    here's a pic of the engines I just got em in the boat and have took it out about 4 times
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_9990.jpg 
Views:	43 
Size:	15.5 KB 
ID:	343273  

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Some guy obnoxious001's Avatar
    Join Date
    Dec 2007
    Posts
    3,570

    Default

    Quote Originally Posted by Rude Ron View Post
    hello anyone know what at idle in gear rpm I should be running for twin 454 magnum engines with moderate 540 lift hydraulic flat tappet cams? I've keep it around a thousand rpm's cuz the motors are brand new so to make sure the cams are getting plenty of oil while idling out of the fairly long 5 mph no wake zone at the launch ramp, but thats too high and hard to dock, I'm confident the cams were broken in correctly on initial start up, but hear lots of horror stories about cam lobes going flat now days. I run a zinc replacement in my oil and have killer oil pressure with High Volume oil pumps, so what do you think a good in gear idle rpm is? thanks for any help ron

    here's a pic of the engines I just got em in the boat and have took it out about 4 times
    If you have Bravo drives, I believe you need to be at 800 RPM or less to not hurt the drive when you put it in and out of gear.

  4. #3
    Senior Member
    Join Date
    Apr 2010
    Location
    Rocklin, Calif.
    Posts
    1,394

    Default

    Hey, Hairball..What happend about the 2 drums of c-16?
    Randy

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,812

    Default

    Quote Originally Posted by obnoxious001 View Post
    If you have Bravo drives, I believe you need to be at 800 RPM or less to not hurt the drive when you put it in and out of gear.
    ditto minus 200 rpm! In and out of gear at 1000 rpm will kill the out-drives. I would tune it and set idle at a max of 800 rpm! If you have break in time and the bottom end works well tune it down it a pinch. JMO!!!

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95